KR102635739B1 - Washing machine with a process for reducing washing cycle time - Google Patents

Abstract

The present invention relates to a washing machine that can shorten the washing time by quickly heating the wash water during boiling washing. This embodiment is a washing machine in which the washing process is performed by heating the water supplied to the inside, and a receiving space is formed inside the washing machine. a cabinet, a water storage tank installed inside the cabinet, a washing tank rotatably disposed inside the water storage tank, a heating device installed between the water storage tank and the washing tank in a space below the water tank, and water supply, heating, washing and It includes a control module that controls a washing process involving drainage, and the control module detects that the heating device is submerged and controls the operation of the heating device to heat the supplied water.

Description

Washing machine with a process for reducing washing cycle time}

The present invention relates to a washing machine, and more specifically, to a washing machine that can shorten washing time by quickly heating wash water during boiling washing.

In general, clothes care machines include washing machines, dryers, refreshers, etc. Washing machines are largely pulsator-type washing machines that wash by water currents generated by rotating a plate-shaped pulsator and rotating a drum that is laid down. Depending on the type, it is classified into a drum washing machine that uses the washing water supplied into the drum and the drop and friction of the laundry.

Among these, drum washing machines have fewer tangles than pulsator-type washing machines, and the amount of washing water and detergent required during the washing process is small, so user demand is rapidly increasing. In this type of drum washing machine, a water tank (tub) is installed in the interior space of the cabinet forming the exterior, and the washing tank (drum) is rotatably installed inside the water tank.

Recently, a drum washing machine has been released that has a heater installed on the bottom of the water tank to heat the washing water and turn it into hot water, allowing boiling washing to be possible by generating hot water on its own inside the washing machine. The heater installed in the washing machine functions to boil washing water or generate steam for boiling washing, steam washing, or sterilization. Therefore, even if cold water flows into the water storage tank, the heater operates and heats to an appropriate temperature for boiling and washing, so there is no need to separately connect to a faucet through which hot water is discharged.

Meanwhile, the boiling washing process according to the prior art consists of water supply, heating, washing (rinsing), and draining processes, as shown in FIG. 1. At this time, water is supplied until the washing water reaches the set water level in the water storage tank. When the water is completely filled, the heater is driven to heat the filled water, and after the washing water is heated to a predetermined temperature, the washing tank is started to start the washing process. It comes true. The water level and temperature of the washing water can be sensed through a separately provided water level sensor and temperature sensor.

In this way, the conventional boiling washing process has the disadvantage of lengthening the entire washing process time due to the water supply and heating time because the heating process is performed after the water supply has ended, that is, after the washing water in the water tank is filled to the set level.

To prevent this, a washing machine has been proposed that has a washing cycle in which a small amount of wash water is supplied first, heated to a high temperature, and then low-temperature wash water is supplied secondarily so that they are mixed together. However, this method has the problem of causing damage to the tub or drum because rapid thermal contraction of the tub and drum occurs when the tub and drum are heated to a high temperature and come into contact with low-temperature wash water. Additionally, this method may cause damage to the components due to rapid temperature changes if the components inside the washing machine are made of materials or plated with different thermal expansion coefficients.

Korean Patent No. 10-2060067 (registered on December 20, 2019, clothing processing device and control method) Korean Patent No. 10-1996527 (registered on June 28, 2019, washing machine with boiling function)

The object of the present invention is to provide a washing machine that can shorten the overall washing cycle time by enabling heating during water supply.

In addition, the present invention was proposed to solve the above problems, and its object is to provide a washing machine that can shorten the washing cycle time without damaging the components inside the washing machine.

In addition, the present invention aims to provide a washing machine that improves the accuracy of water level detection and shortens the washing cycle time to prevent damage to the heating device (heater) due to error.

This embodiment for solving the above problems is a washing machine in which a washing process is performed by heating water supplied to the inside, a cabinet forming an internal receiving space, a water storage tank installed inside the cabinet, and the water storage tank. It includes a washing tank rotatably disposed inside, a heating device installed between the water storage tank and the washing tank in a space below the water storage tank, and a control module for controlling a washing process consisting of water supply, heating, washing, and drainage, and the control module. The module detects that the heating device is submerged and controls the operation of the heating device to heat the supplied water.

In addition, the heating device includes a heating plate having a predetermined thickness and forming a heating surface on the outer surface, a heating electrode layer provided on one side of the heating plate and an electrode pad formed on the inner surface of the heating plate on the opposite side of the heating surface, A lead electrode whose one end is connected to the electrode pad to supply power to the heating electrode layer, a housing that accommodates and protects a portion of the heating plate and the lead electrode so that the heating surface is exposed, and is mounted on the housing to the water reservoir. Inside the reservoir, including a water level sensor that detects the level of water filled inside, and a bracket that is coupled to the side of the housing and fixes the lead electrode and the other end of the water level sensor while exposing it to the outside. It may be configured to be driven to heat the water when immersed in the filled water.

In addition, the housing forms a waterway along the edge of the upper surface, and the waterway is configured to be cut off from the external area by forming a blocking wall with a through hole at an outer end, and the water level detection sensor is installed in the waterway and connected to the waterway. It may be configured to detect the level of incoming water.

In addition, it further includes a water level sensor installed in the water tank at the same height as the heating device to detect the level of water filled in the water tank, and the control module controls the water tank according to the detection signal of the water level sensor. The operation of the heating device can be controlled to heat the water filled inside.

In addition, the control module includes location information where the heat generating device is mounted, and the heat generating device heats the water filled in the water storage tank after water supply starts and a predetermined time based on the location information has elapsed. The operation of can be controlled.

In addition, the control module controls the driving of the driving motor so as not to delay the driving of the heating device, and adjusts the heating device and the driving motor so that the heating noise caused by the heating device is absorbed into the washing noise caused by the driving motor. You can control it.

The present invention has the effect of shortening the overall washing time for boiling laundry by minimizing the time required for heating by starting the process of heating the supplied water during water supply.

In addition, since the present invention applies a heating process to continuously supplied water, the problem of damage to internal components due to differences in thermal expansion does not occur.

In addition, in the present invention, the water level sensor is integrated into the heating device, thereby improving the accuracy of water level detection and preventing damage to the heating device due to errors.

1 is a block diagram showing the boiling washing process of a washing machine according to the prior art;
2 is a diagram showing the main configuration of the drum washing machine according to this embodiment;
3 is a flowchart showing the washing process of the drum washing machine according to this embodiment;
Figure 4 is a perspective view showing the heating device of the drum washing machine according to this embodiment;
Figure 5 is a view of the heating device of Figure 4 viewed from the bottom;
Figure 6 is a diagram showing the internal structure of the heating device of Figure 4;
Figure 7 is a cross-sectional view in the AA direction of the heating device of Figure 4;
Figure 8 is a diagram showing a state in which the heating device of Figure 4 is submerged in water.

The technical problems achieved by the present invention and its implementation will become clear by the preferred embodiments described below. Hereinafter, preferred embodiments of the present invention will be examined in detail with reference to the attached drawings.

It should be understood that the differences in this embodiment, described later, are not mutually exclusive. That is, without departing from the spirit and scope of the present invention, the specific shape, structure, and characteristics described may be implemented in other embodiments with respect to one embodiment, and the positions of individual components within each disclosed embodiment. Alternatively, it should be understood that the arrangement may be changed, and similar reference numbers in the drawings refer to the same or similar functions across various aspects, and the length, area, thickness, etc. may be exaggerated for convenience. In the description of this embodiment, expressions such as top, bottom, before, after, first, second, one side, the other side, etc. indicate relative positions, directions, and orders, and the technical meaning is not limited by the dictionary meaning. No, I will.

Figure 2 is a diagram showing the main configuration of the drum washing machine according to this embodiment, and Figure 3 is a flow chart showing the washing process of the drum washing machine according to this embodiment.

First, referring to FIG. 2, the drum washing machine of this embodiment includes a cabinet 10 forming a receiving space therein, a water storage tank 20 (or tub) installed inside the cabinet 10, and a water storage tank 20 inside the water storage tank 20. It includes a washing tub (30, or drum) rotatably disposed, a heating device (100, heater) installed between the water storage tank (20) and the washing tub (30), and a drive motor (40) that rotates the washing tub (30). do. In addition, the drum washing machine is provided with a water supply port and a detergent supply port at the top of the cabinet 10, a drain port at the bottom, and a control module (not shown) that controls the washing process.

The drum washing machine of this embodiment is filled with washing water, that is, water is supplied to the inside of the storage tank 20, and when the water is filled to the extent that the heating device 100 is submerged, the heating device 100 is driven to heat the water. After being heated to this predetermined temperature, the washing machine operates to perform laundry. In the drum washing machine configured as described above, the cabinet 10, water storage tank 20, washing tank 30, and drive motor 40 may have known configurations.

In the drum washing machine of this embodiment, the heating device 100 detects that the water storage tank 20 is filled with water, and the control module heats the water from the time the water is filled to the position of the heating device 100. Controls the operation of the heating device 100. Therefore, in the drum washing machine of this embodiment, the heating device 100 is installed in the lower space of the water storage tank 20, and water heating begins when the heating device 100 begins to be submerged, thereby shortening the total washing time required for washing. You can.

Referring to FIG. 3, looking at the washing process of the drum washing machine according to this embodiment, when the washing cycle starts, water is first supplied into the water storage tank and the water storage tank is filled from the bottom (S11). At this time, the control module determines whether the water is filled to the first water level, that is, the water level at which the heating device 100 begins to be submerged (S12), and according to the result, if the water is filled to the first water level, the heating device 100 is It starts to heat the water in the reservoir (S13). Here, the first water level is detected through a water level sensor (see 160 in FIG. 4) provided inside the heating device 100.

And the control module drives the heating device 100 and simultaneously controls the water supply to be continuously supplied up to the set water level. Next, the control module determines whether the water has been filled to the second water level, that is, a set water level that allows washing (S14), and stops water supply when the water has been filled to the first water level according to the result (S15). At the same time, the control module monitors whether the water temperature reaches the set temperature, that is, the temperature at which boiling and washing are possible (S16), and controls the operation of the heating device 100 to stop heating when the water temperature reaches the set temperature (S16). S17). In this way, since the water starts to be heated when a certain amount of water is filled in the lower part of the water storage tank 20, that is, when the heating device 100 is submerged, there is an effect of shortening the total time for the washing process.

Then, the control module controls the drive motor 40 to perform washing (S18), and after washing is performed for a predetermined time, drainage is performed to proceed with a series of washing processes (S19). The process of water supply, heating, washing and draining is repeated as many times as necessary.

Shortening of the washing time according to an embodiment of the present invention is possible by the heating device 100 having a water level sensor, and the heating device 100 of this embodiment accurately detects the water level to prevent damage to the device. It is structured so that it can be done. Hereinafter, the heating device 100 will be described in detail.

FIG. 4 is a perspective view showing the heating device of the drum washing machine according to the present embodiment, FIG. 5 is a view of the heating device of FIG. 4 viewed from the bottom, FIG. 6 is a view showing the internal structure of the heating device of FIG. 4, and FIG. Figure 7 is a diagram showing a cross-section in the direction A-A of the heating device of Figure 4, and Figure 8 is a diagram showing the heating device of Figure 4 in a state in which it is submerged in water.

Referring to FIGS. 4 to 6, the heating device 100 of this embodiment is composed of a planar heating element, a heating plate 110 that generates heat, and a heating electrode layer ( 120, a resistance electrode layer 130 formed on the upper surface of the heating plate 110 that does not overlap the heating electrode layer 120, a housing 140 that accommodates and protects the heating plate 110, and a heating device 100. ) includes a bracket 150 mounted on the water tank 20 of the washing machine, and a water level sensor 160 mounted on the housing 140. In addition, the heating device 100 includes a first sealing member 170 interposed between the heating plate 110 and the housing 140, and a second sealing member 180 interposed between the housing 140 and the bracket 150. ) further includes.

When power is supplied to the heating device 100 through a pair of first lead electrodes 121, high-temperature heat is generated in the heating electrode layer 120 as a current flows along the heating electrode layer 120, and the generated Heat is emitted through the heating plate 110 and heats water in contact with the surface.

The heating plate 110 for this purpose is made of a material that has insulating properties and excellent thermal conductivity. In addition, the heating plate 110 is a plate with a predetermined thickness, the central area of which is bent concavely, and the concave surface (lower surface) forms a heating surface 111 that heats water in contact with it. For example, as shown in FIGS. 5 and 7, the heating plate 110 is made of a square plate made of SUS material and has a bent structure in which the central area is concavely recessed into a square shape, and the concave groove formed by bending provides a heating surface (111).

Meanwhile, when high-temperature heat is generated in the heating electrode layer 120, a large temperature difference occurs in the heating plate 110 between the central area where the electrode layer is formed and the edge area where the electrode layer is not formed, and this temperature difference causes the plate to The shape may change as it bends or twists. Thermal deformation of the heating plate 110 due to such temperature deviation becomes more noticeable as the thickness of the material becomes thinner, so the heating plate 110 with a simple plate structure has limitations in reducing the thickness due to such thermal deformation. Therefore, if the heating plate 110 has a sufficient thickness to prevent thermal deformation, a plate structure can be formed. However, in this case, the heating plate 110 must have a thickness above a certain level, so the weight of the heating device becomes heavy and the manufacturing cost increases depending on the material cost. There is a downside to rising.

However, when bending processing is applied as in the present embodiment to form a concave heating surface 111 in the central area, both sides of the heating surface 111 function as reinforcing ribs, so the thickness of the heating plate 110 can be reduced. However, it has the effect of preventing thermal deformation. For example, the heating plate 110 of this embodiment may have a thickness of 0.6 mm or less, and no deformation due to heat occurs even at this thin thickness.

In addition, as shown in FIGS. 5 and 7, the heating plate 110 of this embodiment has a concave heating surface 111 that has an inclined surface structure. That is, the heating space 111a below the heating plate 110 formed by the concave groove is formed relatively deep on one side and becomes shallower toward the other side.

The heating device 100 operates while submerged in water inside the water storage tank 20, and the contaminated water is discharged after washing is completed. At this time, since no water should remain on the concave groove heating surface 111, it is preferable that the concave heating surface 111 is mounted facing downward. Accordingly, the surface (lower surface) of the heating plate 110 forms a heating surface 111 in the shape of a groove concave upward, and a heating space 111a is formed below it. At this time, when the water reservoir 20 of the washing machine is filled with water, an air pocket may be formed in the concave heating space 111a.

When the heating surface 111 is formed horizontally parallel to the water surface, air pockets are formed in the entire area of the heating surface 111, and even if the water storage tank 11 is filled with water, it does not contact the heating surface 111, so the heating plate (110) may overheat and become damaged. However, when the heating surface 111 has an inclined surface structure as in the present embodiment, the air pocket is formed only in the uppermost part of the heating space 111a, so the space in which the air pocket can be formed is minimized to prevent the air pocket from forming. Overheating and damage to the heating plate 110 can be prevented.

In addition, the heating plate 110 of this embodiment is finished so that an edge end is bent or curled to one side to form a reinforcing flange 112. This reinforcing flange 112 can also prevent deformation of the heating plate 110. The reinforcing flange 112 is preferably formed at a lower height than the heating surface 111 so as not to interfere with the process of forming the heating electrode layer 120 on the heating surface 111.

In addition, when the heating plate 110 of this embodiment is combined with the housing 140, a fastening means such as a screw may be used, but the heating plate 110 and the housing 140 are attached to the housing 140 due to their own structures. can be combined To this end, a plurality of fastening holes 113 are further formed in the reinforcing flange 112 of the heating plate 110, and a plurality of fastening protrusions 141 of a hook structure are formed in the housing 140 at positions corresponding to the fastening holes 113. ) is formed.

The heating electrode layer 120 may be formed by printing a conductive heating paste having a predetermined resistance on the surface of the heating plate 110. As shown, the surface (top surface) of the heating plate 110 on the opposite side of the heating surface 111 is formed in The heating electrode layer 120 may have a strip shape with a predetermined width and length, and both ends provide a pair of first electrode pads 121 with which the first lead electrode 122 is in contact.

The first lead electrode 122 is configured to supply power to the heating electrode layer 120, and a pair of conductive metal wires may be used. One end of the first lead electrode 122 is connected to the first electrode pad 121, and the other end penetrates the bracket 150 and is exposed to the outside to form the first lead terminal 123.

The resistance electrode layer 130 is formed by printing a conductive heating paste having a predetermined resistance on the surface of the heating plate 110 in an area where the heating electrode layer 120 is not formed. The resistance electrode layer 130 may have a strip shape with a predetermined width and length, and both ends provide a pair of second electrode pads 131 with which the second lead electrode 132 is in contact.

The resistance electrode layer 130 measures the resistance of the heating electrode layer 120 according to temperature to predict the temperature of the heated water. In general, resistance varies depending on temperature, so the heating plate 110, which heats water by measuring the resistance of the heating electrode layer 120, which changes depending on the temperature of the heating plate 110 through the resistance electrode layer 130, is predetermined. The power supplied to the heating electrode layer 120 is controlled so that it can be heated to a constant temperature. The resistance electrode layer 130 for this purpose may be formed by printing a conductive paste made of the same material as the heating electrode layer 120. Additionally, the resistance electrode layer 130 is connected to an external resistance measurement module through the second lead electrode 132.

Meanwhile, the resistance electrode layer 130 can be used to predict the temperature of water by measuring the resistance of the heating electrode layer 120, but can also function as another heating electrode layer that heats the heating plate 110. That is, the heating device 100 may be used to apply heat to a localized area using the heating plate 110, if necessary. In this case, the resistance electrode layer 130 is made of a conductive paste made of the same material as the heating electrode layer 120 and is formed in a relatively small area, so by applying power to the resistance electrode layer 130, the heating plate 110 is applied to a local area. It can cause fever. Accordingly, the resistance electrode layer 130 may be configured to be selectively connected to an external resistance measurement module or power supply module through the second lead electrode 132.

The second lead electrode 132 is configured to supply power to the resistance electrode layer 130. A pair of conductive metal wires may be used, with one end in contact with the second electrode pad 131 and the other end touching the second electrode pad 131. It penetrates the bracket 150 and is exposed to the outside to form the second lead terminal 133.

The housing 140 accommodates the heating plate 110, the first lead electrode 122, and the second lead electrode 132, insulates and protects them from the outside, and is made of a non-conductive material with high heat resistance. The housing 140 forms a sufficient space to accommodate the heating plate 110 therein, and accommodates the heating plate 110 at its lower portion while exposing the heating surface 111 of the heating plate 110.

In addition, the housing 140 forms a concave groove-shaped water channel 142 along the edge of the upper surface, as shown in FIGS. 4 and 7. The waterway 142 is cut off from the outside through the blocking wall 143 at the outer end, and is connected to the outside through the through hole 144 in the front of the housing 140. Therefore, when the water storage tank 20 is filled with water while the heating device 100 is mounted on the washing machine, the water is filled in the water channel 142 through the through hole 144, and when the water is drained after the end of washing, the water is filled in the water channel 142. The water is drained again through the through hole 144. A water level sensor 160 is installed in the water channel 142 to detect the level of water filling the water storage tank 20.

Additionally, the housing 140 may have a concave curved upper surface and may be formed with an avoidance groove 145 through which the washing tub 3 of the washing machine is avoided. The avoidance groove 145 is formed as a curved surface in a direction corresponding to the circumferential surface of the washing tub 3, and preferably has a curvature corresponding to the circumferential surface of the washing tub 3.

The bracket 150 is coupled to the housing 140 to seal the side opening of the housing 140 where the ends of the first and second lead electrodes 122 and 133 and the water level sensor 160 are exposed, and the first and second lead electrodes ( 122, 133) and the water level sensor 160 are fixed, and the heating device 100 can be mounted on the water storage tank 20.

The water level sensor 160 is a component that detects the level of water filled in the water tank and allows the heating device to be driven. That is, when water is detected by the water level sensor 160, the water is filled to the level at which the heating device 100 can be operated, that is, the water level at which the heating device 100 is submerged, so the water storage tank 20 is filled with water. In other words, the heating device 100 may be operated while water supply is in progress. Therefore, since the heating device 100 is driven in advance to heat the water before the water storage tank is completely filled with a washable amount of water, the time to heat the water to a washable temperature can be shortened. The water level sensor 160 for this purpose may be composed of a pair of electrode rods with one end extending inside the waterway and the other end exposed to the outside of the bracket 150, and various types of electrodes as a means of detecting the water level. It may consist of a sensor.

In addition, the water level sensor 160 is installed in the waterway 142 protected from the outside by the blocking wall 143. Generally, in the process of filling the water tank 20 with water, severe waves (waves) are generated, and the accuracy of water level detection may be greatly reduced by the waves. Therefore, as shown in FIG. 8, when the waterway 142 is protected by the barrier wall 143, waves W are generated severely in the water filled outside the waterway 142, but the water flowing inside the waterway 142 The accuracy of water level detection can be improved because the incoming water does not generate waves and the water level rises at a constant rate.

The first sealing member 170 is intervened between the heating plate 110 and the housing 140 to seal between the heating plate 110 and the housing 140. The second sealing member 180 is intervened between the housing 140 and the bracket 150 to seal the space between them, and at the same time, when the bracket 150 is coupled to the water tank 20, the housing 140 and the water tank 20 By sealing the gap, leakage of water filled in the water tank 20 is prevented. The first and second sealing members 160 and 170 may be made of silicon material with high heat resistance and elasticity.

As shown in FIG. 2, the heating device 100 configured as described above is fastened so that the housing 140 is located inside the water storage tank 20, and as it begins to be immersed inside the water storage tank 20, the heating device 100 It is driven and heats the water. Therefore, the time can be shortened by heating the water even while the water supply is in progress.

Meanwhile, in another embodiment of the drum washing machine to shorten the washing cycle time, the water level sensor is configured separately from the heating device and can be installed at a specific location at the same height as the heating device. In another embodiment of the drum washing machine, location information where the heating device is mounted is inputted in advance to the control module, water supply starts, and the heating device can be set to operate after a predetermined time has elapsed based on the location information. In both cases, the location where the water level sensor is installed and the operating time of the heating device must be appropriately selected to prevent malfunction of the heating device due to dispersion.

In addition, the drum washing machine of this embodiment is configured so that the driving motor is driven simultaneously with the heating device or immediately before the heating device is driven. The heating device 100 instantaneously emits high-temperature heat to heat cold water. At this time, heating noise may be generated due to a temperature difference between the heating device 100 and the cold water. Although such heating noise does not cause malfunction or damage to the washing machine, users may misunderstand or be confused that the washing machine is malfunctioning or damaged due to the heating noise.

To prevent this, when controlling the operation of the heat generating device 100, the control module simultaneously drives the driving motor 40 or at least drives the driving motor 40 first before driving the heat generating device 100. 100) and the driving motor 40. Therefore, when the washing tank 30 is preliminarily rotated prior to main washing by driving the drive motor 40, the washing noise, such as the sound of water, absorbs the heating noise, thereby preventing user misunderstanding or confusion due to the heating noise. there is.

Although exemplary embodiments of the present invention have been shown and described as described above, various modifications and other embodiments will occur to those skilled in the art. These modifications and other embodiments are to be considered and included in the appended claims without departing from the true spirit and scope of the present invention.

10: Case 20: Water tank
30: Washing tub 40: Drive motor
100: heating device
110: Heating plate 111: Heating surface
112: reinforcing rib 113: fastening hole
120: heating electrode layer 121: first electrode pad
122: first lead electrode 123: first lead terminal
130: heating electrode layer 131: second electrode pad
132: second lead electrode 133: second lead terminal
140: Housing 141: Fastening protrusion
142: waterway 143: barrier
144: through hole 145: avoidance groove
150: Bracket 160: Water level sensor
170: first sealing member 180: second sealing member

Claims (6)

In a washing machine in which the washing process is performed by heating the water supplied to the interior,
A cabinet forming a receiving space therein, a water tank installed inside the cabinet, a washing tank rotatably disposed inside the water tank, a drive motor for rotating the washing tank, and the water tank and the water tank in a space below the water tank. It includes a heating device installed between the washing tubs and a control module that controls the washing process consisting of water supply, heating, washing, and drainage,
The heating device is,
A heating plate having a predetermined thickness and forming a heating surface on the outer surface;
a heating electrode layer formed on an inner surface of the heating plate opposite the heating surface while providing an electrode pad on one side;
a lead electrode whose one end is connected to the electrode pad to supply power to the heating electrode layer;
A part of the heating plate and the lead electrode is received and protected so that the heating surface is exposed, and a water channel is formed along the edge, wherein the water channel is cut off from the external area by forming a blocking wall with a through hole at an outer end. housing;
A water level sensor installed in the waterway of the housing to detect water flowing into the waterway; and,
It includes a bracket that is coupled to the side of the housing and fixes the lead electrode and the other end of the water level sensor while exposing it to the outside,
The control module detects that the heating device is submerged and controls the operation of the heating device to heat supplied water. delete delete delete delete The method of claim 1, wherein the control module:
Reducing the washing cycle time by controlling the driving of the driving motor so as not to delay the driving of the heating device, and controlling the heating device and the driving motor so that the heating noise generated by the heating device is absorbed into the washing noise generated by the driving motor. A washing machine equipped with a process.

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